import './style.less';
import { getStrFullLength, cutStrByFullLength } from '../_util/util';
import Input from 'ant-design-vue/es/input';
const TextArea = Input.TextArea;

export default {
  name: 'LimitTextArea',
  model: {
    prop: 'value',
    event: 'change',
  },
  props: Object.assign({}, TextArea.props, {
    prefixCls: {
      type: String,
      default: 'ant-textarea-limit',
    },
    // eslint-disable-next-line
    value: {
      type: String,
    },
    limit: {
      type: Number,
      default: 200,
    },
  }),
  data() {
    return {
      currentLimit: 0,
    };
  },
  watch: {
    value(val) {
      this.calcLimitNum(val);
    },
  },
  created() {
    this.calcLimitNum(this.value);
  },
  methods: {
    handleChange(e) {
      const value = e.target.value;
      const len = getStrFullLength(value);
      if (len <= this.limit) {
        this.currentLimit = len;
        this.$emit('change', value);
        return;
      } else {
        const str = cutStrByFullLength(value, this.limit);
        this.currentLimit = getStrFullLength(str);
        this.$emit('change', str);
      }
      console.error('limit out! currentLimit:', this.currentLimit);
    },
    calcLimitNum(val) {
      const len = getStrFullLength(val);
      this.currentLimit = len;
    },
  },
  render() {
    const { prefixCls, ...props } = this.$props;
    return (
      <div class={this.prefixCls}>
        <TextArea {...{ props }} value={this.value} onChange={this.handleChange}>
        </TextArea>
        <span class="limit">{this.currentLimit}/{this.limit}</span>
      </div>
    );
  },
};
